package org.kuali.student.lum.program.client.major.view;

 import org.kuali.student.common.assembly.data.Data;

 import org.kuali.student.common.assembly.data.Data.Property;

 import org.kuali.student.common.ui.client.application.KSAsyncCallback;

 import org.kuali.student.common.ui.client.application.ViewContext;

 import org.kuali.student.common.ui.client.mvc.DataModel;

 import org.kuali.student.common.ui.client.mvc.history.HistoryManager;

 import org.kuali.student.common.ui.shared.IdAttributes.IdType;

 import org.kuali.student.lum.common.client.widgets.AppLocations;

 import org.kuali.student.lum.common.client.widgets.DropdownList;

 import org.kuali.student.lum.program.client.ProgramConstants;

 import org.kuali.student.lum.program.client.ProgramRegistry;

 import org.kuali.student.lum.program.client.ProgramSections;

 import org.kuali.student.lum.program.client.ProgramStatus;

 import org.kuali.student.lum.program.client.events.ModelLoadedEvent;

 import org.kuali.student.lum.program.client.events.ProgramViewEvent;

 import org.kuali.student.lum.program.client.major.ActionType;

 import org.kuali.student.lum.program.client.major.MajorController;

 import com.google.gwt.core.client.GWT;

 import com.google.gwt.event.dom.client.ChangeEvent;

 import com.google.gwt.event.dom.client.ChangeHandler;

 import com.google.gwt.event.shared.HandlerManager;

 public class MajorViewController extends MajorController {

     private final DropdownList actionBox = new DropdownList(ActionType.getValues());

     /**

      * Constructor.

      *

      * @param programModel

      */

     public MajorViewController(DataModel programModel, ViewContext viewContext, HandlerManager eventBus) {

         super(programModel, viewContext, eventBus);

         configurer = GWT.create(MajorViewConfigurer.class);

         initHandlers();

     }

     private void initHandlers() {

         actionBox.addChangeHandler(new ChangeHandler() {

             @Override

             public void onChange(ChangeEvent event) {

                 ActionType actionType = ActionType.of(actionBox.getSelectedValue());

                 ViewContext viewContext = getViewContext();

                 if (actionType == ActionType.MODIFY) {

                     ProgramRegistry.setSection(ProgramSections.getEditSection(getCurrentViewEnum()));

                     HistoryManager.navigate(AppLocations.Locations.EDIT_PROGRAM.getLocation(), viewContext);

                 } else if (actionType == ActionType.MODIFY_VERSION) {

                     String versionIndId = getStringProperty(ProgramConstants.VERSION_IND_ID);

                     viewContext.setId(versionIndId);

                     viewContext.setIdType(IdType.COPY_OF_OBJECT_ID);

                     HistoryManager.navigate(AppLocations.Locations.EDIT_PROGRAM.getLocation(), viewContext);

                 }

             }

         });

         eventBus.addHandler(ProgramViewEvent.TYPE, new ProgramViewEvent.Handler() {

             @Override

             public void onEvent(ProgramViewEvent event) {

                 actionBox.setSelectedIndex(0);

             }

         });

         eventBus.addHandler(ModelLoadedEvent.TYPE, new ModelLoadedEvent.Handler() {

             @Override

             public void onEvent(ModelLoadedEvent event) {

                 resetActionList();

                 String type = context.getAttributes().get(ProgramConstants.TYPE);

                 if (type != null) {

                     context.getAttributes().remove(ProgramConstants.TYPE);

                     if (type.equals(ProgramConstants.VARIATION_TYPE_KEY)) {

                         showVariationView();

                     } else {

                         showView(ProgramSections.VIEW_ALL);

                     }

                 } else {

                     showView(ProgramSections.VIEW_ALL);

                 }

             }

         });

     }

     protected void resetActionList() {

             //Only allow modify with version option for an active course that id also the latest version

             ProgramStatus status = ProgramStatus.of(programModel);

         String versionIndId = getStringProperty(ProgramConstants.VERSION_IND_ID);

         Long sequenceNumber = programModel.get(ProgramConstants.VERSION_SEQUENCE_NUMBER);

         actionBox.clear();

         if (status == ProgramStatus.ACTIVE){

                 programRemoteService.isLatestVersion(versionIndId, sequenceNumber, new KSAsyncCallback<Boolean>(){

                                 public void onSuccess(Boolean isLatest) {

                                 actionBox.setList(ActionType.getValues(isLatest));                                

                                 }                

                 });

         } else {

                 actionBox.setList(ActionType.getValues(false));

         }

     }

     private void showVariationView() {

         String variationId = context.getAttributes().get(ProgramConstants.VARIATION_ID);

         if (variationId != null) {

             context.getAttributes().remove(ProgramConstants.VARIATION_ID);

             final Data variationMap = getDataProperty(ProgramConstants.VARIATIONS);

             if (variationMap != null) {

                 int row = 0;

                 for (Property p : variationMap) {

                     final Data variationData = p.getValue();

                     if (variationData != null) {

                         if (variationData.get(ProgramConstants.ID).equals(variationId)) {

                             //FIXME: Find a better way to do this.

                             // We shouldn't be maintaining two separate datamodels for progs and variations

                             Data credData = getDataProperty(ProgramConstants.CREDENTIAL_PROGRAM);

                             variationData.set(ProgramConstants.CREDENTIAL_PROGRAM, credData);

                             ProgramRegistry.setData(variationData);

                             ProgramRegistry.setRow(row);

                         }

                         row++;

                     }

                 }

                 HistoryManager.navigate(AppLocations.Locations.VIEW_VARIATION.getLocation(), context);

             }

         }

     }

     @Override

     protected void configureView() {

         super.configureView();

         addContentWidget(actionBox);

         initialized = true;

     }

 }